Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f62a8709c878271…

MALICIOUS

PDF

39.4 KB Created: 2020-08-23 20:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6081cb6c61eedaa61c4c1adc91247c0 SHA-1: d180c69155acb0a903d86360b00295235bfae9d3 SHA-256: 5f62a8709c87827179977d173c6c6de94605a9135a181995116115e71ef70289
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, identified as a "PDF_MALICIOUS_REDIRECTOR_LINK" and "PDF_SEO_LINK_FARM". The document body, though heavily obfuscated, contains the target URL, suggesting an attempt to trick users into visiting a malicious site under the guise of "cricket game net" information. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=cricket+game++net In PDF document text
    • http://devedime.pesfusd.com/uploads/1/3/1/4/131482916/9602127.pdfIn PDF document text
    • http://moribub.diversejewellers.com/uploads/1/3/1/3/131383483/nujerolugize_desukotopixifib_guxola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/narewetojosuminu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/pajodutewuzifafasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/ilauncher_ios_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/25089131487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/41995684356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/6676778293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/literal_and_free_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7555/0873/files/908_316_8677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4464/1685/files/dna_and_mrna_transcription_and_translation_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kujefitil.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000602a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602A 4876 bytes
SHA-256: 256145fbae8149ab0a525518c5845e326ec0eecf467decc824c9d642c9289c5b
font_01_sfnt_off000070aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AA 9608 bytes
SHA-256: 4e806b05b8ee0979e9d96c3371df65ba09a978ca457e0da014c6bfeadbb847c5

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